CSSFriendly NullReferenceException

我正在調試一個項目，但發生了一個錯誤，VS2008沒有顯示我行。相反，它只是在瀏覽器上顯示異常消息和堆棧跟蹤，就好像我正在運行w/o調試一樣。CSSFriendly NullReferenceException

System.NullReferenceException 

    [NullReferenceException: Referência de objeto não definida para uma instância de um objeto.] 
CSSFriendly.GridViewAdapter.GetRowClass(GridView gridView, GridViewRow row) +77 
    CSSFriendly.GridViewAdapter.WritePagerSection(HtmlTextWriter writer, PagerPosition pos) +472 
    CSSFriendly.GridViewAdapter.RenderContents(HtmlTextWriter writer) +1712 
    System.Web.UI.WebControls.Adapters.WebControlAdapter.Render(HtmlTextWriter writer) +26 
    System.Web.UI.Control.RenderControlInternal(HtmlTextWriter writer, ControlAdapter adapter) +8681769 
    System.Web.UI.Control.RenderControl(HtmlTextWriter writer, ControlAdapter adapter) +99 
    System.Web.UI.Control.RenderControl(HtmlTextWriter writer) +25 
    ASP.app_content_admin_sessionlist_aspx.__RenderContent1(HtmlTextWriter __w, Control parameterContainer) in c:\WINDOWS\Microsoft.NET\Framework\v2.0.50727\Temporary ASP.NET Files\root\4f0f40bf\a520276f\App_Web_sessionlist.aspx.7715d851.odu1yfl8.0.cs:0 
    System.Web.UI.Control.RenderChildrenInternal(HtmlTextWriter writer, ICollection children) +256 
    System.Web.UI.Control.RenderChildren(HtmlTextWriter writer) +19 
    System.Web.UI.Control.Render(HtmlTextWriter writer) +10 
    System.Web.UI.Control.RenderControlInternal(HtmlTextWriter writer, ControlAdapter adapter) +27 
    System.Web.UI.Control.RenderControl(HtmlTextWriter writer, ControlAdapter adapter) +99 
    System.Web.UI.Control.RenderControl(HtmlTextWriter writer) +25 
    System.Web.UI.Control.RenderChildrenInternal(HtmlTextWriter writer, ICollection children) +134 
    System.Web.UI.Control.RenderChildren(HtmlTextWriter writer) +19 
    System.Web.UI.Control.Render(HtmlTextWriter writer) +10 
    System.Web.UI.Control.RenderControlInternal(HtmlTextWriter writer, ControlAdapter adapter) +27 
    System.Web.UI.Control.RenderControl(HtmlTextWriter writer, ControlAdapter adapter) +99 
    System.Web.UI.Control.RenderControl(HtmlTextWriter writer) +25 
    System.Web.UI.Control.RenderChildrenInternal(HtmlTextWriter writer, ICollection children) +134 
    System.Web.UI.Control.RenderChildren(HtmlTextWriter writer) +19 
    System.Web.UI.HtmlControls.HtmlForm.RenderChildren(HtmlTextWriter writer) +163 
    System.Web.UI.HtmlControls.HtmlContainerControl.Render(HtmlTextWriter writer) +32 
    System.Web.UI.HtmlControls.HtmlForm.Render(HtmlTextWriter output) +51 
    System.Web.UI.Control.RenderControlInternal(HtmlTextWriter writer, ControlAdapter adapter) +27 
    System.Web.UI.Control.RenderControl(HtmlTextWriter writer, ControlAdapter adapter) +99 
    System.Web.UI.HtmlControls.HtmlForm.RenderControl(HtmlTextWriter writer) +40 
    System.Web.UI.Control.RenderChildrenInternal(HtmlTextWriter writer, ICollection children) +134 
    System.Web.UI.Control.RenderChildren(HtmlTextWriter writer) +19 
    System.Web.UI.Control.Render(HtmlTextWriter writer) +10 
    System.Web.UI.Control.RenderControlInternal(HtmlTextWriter writer, ControlAdapter adapter) +27 
    System.Web.UI.Control.RenderControl(HtmlTextWriter writer, ControlAdapter adapter) +99 
    System.Web.UI.Control.RenderControl(HtmlTextWriter writer) +25 
    System.Web.UI.Control.RenderChildrenInternal(HtmlTextWriter writer, ICollection children) +134 
    System.Web.UI.Control.RenderChildren(HtmlTextWriter writer) +19 
    System.Web.UI.Control.Render(HtmlTextWriter writer) +10 
    System.Web.UI.Control.RenderControlInternal(HtmlTextWriter writer, ControlAdapter adapter) +27 
    System.Web.UI.Control.RenderControl(HtmlTextWriter writer, ControlAdapter adapter) +99 
    System.Web.UI.Control.RenderControl(HtmlTextWriter writer) +25 
    System.Web.UI.Control.RenderChildrenInternal(HtmlTextWriter writer, ICollection children) +134 
    System.Web.UI.Control.RenderChildren(HtmlTextWriter writer) +19 
    System.Web.UI.Page.Render(HtmlTextWriter writer) +29 
    System.Web.UI.Control.RenderControlInternal(HtmlTextWriter writer, ControlAdapter adapter) +27 
    System.Web.UI.Control.RenderControl(HtmlTextWriter writer, ControlAdapter adapter) +99 
    System.Web.UI.Control.RenderControl(HtmlTextWriter writer) +25 
    System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +1266

來源

2009-09-28 Eduardo Mello

對不起，我沒有得到代碼的東西正常工作。 –

對於我來說，通過逐步調試，問題出現在CSSFriendly上。但我不明白爲什麼。 –